在 iOS 13 上的 Swift 中为 Firebase 设置登录 Apple 时出错的原因？

Question

我一直在关注https://firebase.google.com/docs/auth/ios/apple并且它确实提到了我收到的错误“将 SHA256 哈希随机数作为十六进制字符串发送”，但它没有提供任何帮助解决它，我的搜索没有给我一个有效的解决方案。

我的视图控制器代码摘录是

        fileprivate var currentNonce: String?

        @objc @available(iOS 13, *)
        func startSignInWithAppleFlow() {
          let nonce = randomNonceString()
          currentNonce = nonce
          let appleIDProvider = ASAuthorizationAppleIDProvider()
          let request = appleIDProvider.createRequest()
          request.requestedScopes = [.fullName, .email]
          request.nonce = sha256(nonce)
            print(request.nonce)

          let authorizationController = ASAuthorizationController(authorizationRequests: [request])
          authorizationController.delegate = self
          authorizationController.presentationContextProvider = self
          authorizationController.performRequests()
        }
        @available(iOS 13, *)
        private func sha256(_ input: String) -> String {
          let inputData = Data(input.utf8)
          let hashedData = SHA256.hash(data: inputData)
          let hashString = hashedData.compactMap {
            return String(format: "%02x", $0)
          }.joined()
            print(hashString)
          return hashString
        }
    }
    @available(iOS 13.0, *)
    extension LoginViewController: ASAuthorizationControllerDelegate {

      func authorizationController(controller: ASAuthorizationController, didCompleteWithAuthorization authorization: ASAuthorization) {
        if let appleIDCredential = authorization.credential as? ASAuthorizationAppleIDCredential {
          guard let nonce = currentNonce else {
            fatalError("Invalid state: A login callback was received, but no login request was sent.")
          }
          guard let appleIDToken = appleIDCredential.identityToken else {
            print("Unable to fetch identity token")
            return
          }
          guard let idTokenString = String(data: appleIDToken, encoding: .utf8) else {
            print("Unable to serialize token string from data: \(appleIDToken.debugDescription)")
            return
          }
          // Initialize a Firebase credential.
            print(nonce)
            let credential = OAuthProvider.credential(withProviderID: "apple.com",
                                                      idToken: idTokenString,
                                                      accessToken: nonce)

            print(credential)
          // Sign in with Firebase.
          Auth.auth().signInAndRetrieveData(with: credential) { (authResult, error) in
            if (error != nil) {
              // Error. If error.code == .MissingOrInvalidNonce, make sure
              // you're sending the SHA256-hashed nonce as a hex string with
              // your request to Apple.
                print(authResult)
                print(error!)
                print(error!.localizedDescription)
              return
            }
            // User is signed in to Firebase with Apple.
            // ...
          }
        }
      }

此部分与网页上的说明不同，因为 Xcode 给出了错误

    let credential = OAuthProvider.credential(withProviderID: "apple.com",
                                                      idToken: idTokenString,
                                                      accessToken: nonce)

如果我之前打印随机数

    let credential = OAuthProvider.credential(withProviderID: "apple.com",
                                                      idToken: idTokenString,
                                                      accessToken: nonce)

我得到 2eNjrtagc024_pd3wfnt_PZ0N89GZ_b6_QJ3IZ_

response.nonce 值为 cd402f047012a2d5c129382c56ef121b53a679c0a5c5e37433bcde2967225afe

显然这些不一样，但我似乎无法弄清楚我做错了什么。

完整的错误输出是

Error Domain=FIRAuthErrorDomain Code=17999 "An internal error has occurred, print and inspect the error details for more information." UserInfo={NSUnderlyingError=0x60000388a820 {Error Domain=FIRAuthInternalErrorDomain Code=3 "(null)" UserInfo={FIRAuthErrorUserInfoDeserializedResponseKey={
    code = 400;
    errors =     (
                {
            domain = global;
            message = "MISSING_OR_INVALID_NONCE : Nonce is missing in the request.";
            reason = invalid;
        }
    );
    message = "MISSING_OR_INVALID_NONCE : Nonce is missing in the request.";
}}}, FIRAuthErrorUserInfoNameKey=ERROR_INTERNAL_ERROR, error_name=ERROR_INTERNAL_ERROR, NSLocalizedDescription=An internal error has occurred, print and inspect the error details for more information.}
An internal error has occurred, print and inspect the error details for more information.

Answer 1

我遇到了同样的错误。

解决方法：直接运行

pod update

解释：

问题正如@ethanrj 所说。 文档说要做

let credential = OAuthProvider.credential( 
    withProviderID: "apple.com", IDToken: appleIdToken, rawNonce: rawNonce )

但这会产生错误，Xcode 会建议以下内容（rawNonce -> accessToken）：

let credential = OAuthProvider.credential( 
    withProviderID: "apple.com", IDToken: appleIdToken, accessToken: rawNonce )

这是因为pod install默认会安装 FirebaseAuth 6.12，当你真的需要 6.13 时，因为新的函数签名只在那里可用。 您可以在此处查看源代码（ https://github.com/firebase/firebase-ios-sdk/blob/master/Firebase/Auth/Source/AuthProvider/OAuth/FIROAuthProvider.m ）。

Answer 2

您是否可能使用了错误的凭据方法？ 在文档上，它看起来像使用 nonce 的那个：

 let credential = OAuthProvider.credential( withProviderID: "apple.com", IDToken: appleIdToken, rawNonce: rawNonce )

但是你在这里使用的那个需要一个访问令牌，不确定这是否有帮助。